CN220695041U

CN220695041U - Pot tool

Info

Publication number: CN220695041U
Application number: CN202322138745.1U
Authority: CN
Inventors: 朱泽春; 张彬; 李红亮
Original assignee: Hangzhou Joyoung Household Electrical Appliances Co Ltd
Current assignee: Hangzhou Joyoung Household Electrical Appliances Co Ltd
Priority date: 2023-08-09
Filing date: 2023-08-09
Publication date: 2024-04-02
Anticipated expiration: 2033-08-09

Abstract

The application discloses pan, pan includes: the pot comprises a pot body, a smelting layer and a first nitriding layer. The pot body is provided with an inner cavity for cooking food materials. The meltallizing layer is connected to the surface of the inner cavity, and the meltallizing layer at least partially covers the surface of the inner cavity. The first nitride layer is formed on the surface of the penetration layer, extends from the surface of the penetration layer into the penetration layer, and at least partially covers the penetration layer; wherein the total thickness of the penetration layer and the first nitride layer is 5 μm to 50 μm. In the embodiment scheme of pan that this application provided, have good firm in connection between the layer of penetrating and the pot body, the pan still has good corrosion resistance simultaneously.

Description

Pot tool

Technical Field

The application relates to the field of cooking appliances, in particular to a cooker.

Background

Cookware is the most commonly used tool in kitchen cooking processes, wherein iron cookware is accepted and accepted by most consumers due to its long service life, rapid and uniform heat conduction, easy maintenance, and the like. However, among the numerous food materials, the food materials with high acidity and salt content often have a great influence on the cookware, for example, the food materials may corrode the cookware, resulting in damage to the cookware; in addition, after the cookware is corroded, the ingredients of the food materials can react with the components of the cookware to generate harmful substances, so that the health is threatened. In the long-term cooking use process, the iron wok has the problem of poor acid resistance and salt corrosion resistance. Therefore, improving acid resistance and corrosion resistance is an important development direction in the field of cookware.

In order to avoid the corrosion resistance problem of the iron frying pan, stainless steel materials added with various heavy metal elements such as chromium, nickel, molybdenum and the like which can improve the strength and the corrosion resistance are adopted in the market to prepare the stainless steel frying pan. However, stainless steel woks have limited improvement in corrosion resistance and high heavy metal content, and long-term use may result in consumption of some heavy metal elements by consumers, which is not beneficial to food safety.

In the prior art, some corrosion-resistant cookware is provided, for example, in some technical schemes, a layer of corrosion-resistant metal is fused to the surface of the inner cavity of the cookware body to form a fused layer, and the fused layer plays a role in protecting the cookware body. However, the layer that melts is connected in the inner chamber surface of the pot body, therefore the layer that melts exists and drops the risk, has influenced the life of pan.

Disclosure of Invention

In view of the above, the present application provides a pot for reducing the probability of falling off of a meltallizing layer.

The application provides an embodiment scheme of pan, embodiment scheme includes: the pot body is provided with an inner cavity for cooking food materials; the meltallizing layer is connected to the surface of the inner cavity and at least partially covers the surface of the inner cavity; a first nitride layer formed on a surface of the fuse layer, the first nitride layer extending from the surface of the fuse layer into the fuse layer, the first nitride layer at least partially covering the fuse layer; wherein the total thickness of the melt-shot layer and the first nitride layer is 5 μm to 50 μm.

In these embodiments, the thickness of the melt-blown layer directly affects the impact resistance of the melt-blown layer, and the thicker the melt-blown layer, the more easily the melt-blown layer will fall off the pot during impact or thermal expansion and contraction. Therefore, the proper thickness range is set, so that the penetration layer and the pot body have good combination firmness and good corrosion resistance. According to experiments, the impact resistance is better when the thickness of the fused layer is 5-50 μm, and the impact resistance of the fused layer is obviously reduced when the thickness is more than 50 μm.

In some embodiments, the thickness of the fuse layer the total thickness of the fuse layer and the first nitride layer is 20 μm to 50 μm.

In these embodiments, by further defining the minimum thickness of the penetration layer, the penetration layer is facilitated to have improved resistance to corrosion, thereby allowing the penetration layer to combine corrosion resistance with impact resistance.

In some embodiments, the first nitride layer has a thickness of 10 μm to 20 μm.

In these embodiments, the first nitride layer has good corrosion resistance in this thickness range, and in view of the fact that the thickness of the first nitride layer is generally determined by the nitriding time, the longer the nitriding time is, the thicker the thickness of the first nitride layer is, but if the nitriding time is too long, the production efficiency is affected. Within the thickness ranges of these embodiments, the first nitride layer may have both good corrosion resistance and acceptability of production efficiency.

In some embodiments, the first nitride layer is completely contained within the melt shot layer, the first nitride layer having a hardness greater than a hardness of the pan body, the pan body having a hardness greater than a hardness of the melt shot layer.

In these embodiments, the hardness of the non-nitrided portion of the melt-shot layer is relatively low, so that the non-nitrided portion of the melt-shot layer has better toughness than the pot. In daily use, the pot is often heated and cooled, so that the pot body, the melt-injection layer and the first nitride layer repeatedly expand and contract, and the thermal expansion coefficients of the pot body and the melt-injection layer are different, so that the deformation amounts of the pot body and the melt-injection layer are different in the expansion and contraction processes, and interaction force is generated between the pot body and the melt-injection layer based on the difference of the deformation amounts. Because the toughness of the meltallizing layer is better than that of the pot body, the energy generated by the interaction force can be partially absorbed by the meltallizing layer based on the toughness of the meltallizing layer, the possibility of fracture problem is reduced, and reliable connection firmness between the pot body and the meltallizing layer can be realized to a certain extent. The first nitriding layer is positioned on the surface of the inner cavity and has higher hardness than the pot body and the meltallizing layer, so that the surface of the inner cavity still has good wear resistance.

In some embodiments, the surface of the pan body facing the inner cavity is a rough connecting surface with a rugged shape, and the penetration layer is connected to the rough connecting surface.

In these embodiments, the roughened connection surface helps to increase the contact area of the pot with the melt-blown layer, thereby increasing the connection firmness of the pot with the melt-blown layer.

In some embodiments, a second nitrided layer is formed on a surface of the pan body facing the inner cavity, the second nitrided layer extending from the rough connection face into the pan body; the second nitriding layer at least partially covers the surface of the pot body facing the inner cavity, and the meltallizing layer is connected with the second nitriding layer.

In these embodiments, the second nitride layer helps to further improve the corrosion resistance of the cookware.

In some embodiments, the roughened connection surface has a surface roughness of Ra2 μm to Ra10 μm.

In some embodiments, the melt-shot layer has a plurality of first micropores, the first nitride layer has a plurality of second micropores, and the average pore size of the second micropores is smaller than the average pore size of the first micropores.

In these embodiments, since the second micropores have smaller pore diameters, the first nitride layer can have a good protection effect on the meltallizing layer on the one hand, and the non-tackiness of the pot can be improved on the other hand.

In some embodiments, the material of the pan body is any one of cast iron, cold-rolled steel sheet, aluminum alloy, copper and copper alloy.

In some embodiments, the first nitride layer has a surface roughness of Ra1.5μm to Ra3.0μm.

In these embodiments, the surface of the cavity is smoother, thereby helping to reduce the griping of the turner against the surface of the cavity during cooking and also helping to improve the aesthetics of the surface of the cavity.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic view of a pot according to an embodiment of the present disclosure;

FIG. 2 is a partial schematic view of portion A of FIG. 1;

FIG. 3 is a schematic view of a pot according to another embodiment of the present disclosure;

FIG. 4 is a partial schematic view of portion B of FIG. 2;

wherein, the attached drawings are as follows:

1. a pot body; 10. an inner cavity;

2. a fuse layer;

31. a first nitride layer; 32. and a second nitride layer.

Detailed Description

In order to more clearly illustrate the general concepts of the present application, a detailed description is provided below by way of example in connection with the accompanying drawings.

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

Furthermore, the technical terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or be integrated; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of embodiments of the present application, unless explicitly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the technical field of cookware, in order to improve the corrosion resistance of cookware in the prior art, a protective layer is often added on the surface of the cookware, and corrosion-resistant raw materials are added into the protective layer to improve the corrosion resistance. However, with the development of technology, people gradually find that the protective layer is generally easy to fall off, so that part of the protective layer can be mixed into food, and further the threat to human health can be aggravated. Therefore, how to improve the connection firmness between the protection layer and the pot body is a technical problem to be improved in the art.

With the development of technology, a fused layer generated by a fused-injection method is found to have good connection firmness. It is understood that the layer is formed by a fusion process attached to the surface of the cavity of the pot. The general process of the meltallizing process is to heat the meltallizing raw material to melt the meltallizing raw material, then spray the meltallizing raw material on the surface of the object, cool the meltallizing raw material in a molten state and deposit the meltallizing raw material on the surface of the object to form a layer of lamellar structure firmly connected with the object.

However, the layer is still at risk of falling off under a strong impact.

In view of this, the present application intends to search for a solution that can provide a good connection firmness for the melt-blown layer, based on the structure of the melt-blown layer, so as to partially improve the above-mentioned problems. Specifically, the influence of thickness on the connection firmness of the penetration layer is searched from the thickness direction of the penetration layer, so that the proper penetration layer thickness is obtained, and the falling probability of the penetration layer is reduced.

The following describes the technical scheme of the present application in conjunction with the embodiments.

Referring to fig. 1, in some embodiments of the present application, a pot includes a pot body 1, a fuse layer 2, and a first nitride layer 31, where the pot body 1, the fuse layer 2, and the first nitride layer 31 are stacked. The pot body 1 is positioned at the outermost layer of the pot, and the pot body 1 is formed with an inner cavity 10 for cooking food materials. The layer 2 is attached to the pan body 1 and covers at least partially the side of the pan body 1 facing the inner cavity 10, the layer 2 covering the entire side of the pan body 1 facing the inner cavity 10 in the embodiment shown in fig. 1 and 2. The first nitride layer 31 is formed on the side of the fuse layer 2 facing the cavity 10 and at least partially covers the fuse layer 2, and the first nitride layer 31 covers the entire fuse layer 2 in the embodiment shown in fig. 1 and 2. Wherein the total thickness of the fuse layer 2 and the first nitride layer 31 is 5 μm to 50 μm.

It will be appreciated that the first nitride layer 31 is formed on the surface of the object by a nitridation process. The nitriding process is also called nitriding process, which means that an object is placed in a medium containing nitrogen at a certain temperature, so that nitrogen atoms permeate into the surface of the object, and the nitrogen is combined with components of the object, so that a compact nitride composite layer is formed. That is, the first nitride layer 31 is formed by penetration of nitrogen atoms into the interior of the fuse layer 2, that is, a portion of the fuse layer 2 having a nitrogen content greater than a predetermined value is defined as the first nitride layer 31.

The total thickness of the penetration layer 2 and the first nitride layer 31 has an influence on the corrosion resistance and impact resistance. Specifically, the thicker the total thickness of the fuse layer 2 and the first nitride layer 31, the stronger the corrosion resistance but the weaker the corresponding impact resistance. It has been found through experiments that embodiments in which the total thickness of the penetration layer 2 and the first nitride layer 31 is 5 μm to 50 μm can achieve both corrosion resistance and impact resistance.

Specifically, in this embodiment, a pot made of metallic titanium was used as a material for the melting, and the following experimental data were obtained by adjusting the total thickness of the melting layer 2 and the first nitride layer 31, and a pot D1 as an uncoated melting layer was used as a comparison. The results obtained by testing the impact, acid and brine corrosion resistance of each example are shown in table 1:

TABLE 1

It is understood that, since the first nitride layer 31 is formed inside the penetration layer, the penetration layer thickness in table 1 is the total thickness of the penetration layer 2 and the first nitride layer 31.

The method for testing firmness in table 1 is as follows:

and (3) placing the sample to be tested on an induction cooker, heating to 400 ℃, taking out the sample, immersing the sample in room-temperature water, and cooling for 1min. The above steps were then repeated 50 cycles. It can be understood that the method mainly tests the connection firmness of the melt-injection layer of the pot under the conditions of rapid heating expansion and rapid cooling contraction through the expansion and contraction of the pot.

The acid resistance test method in table 1 is as follows:

pouring an aqueous solution containing about 2% of citric acid into the pot, standing, and observing the falling-off condition of the surface of the pot.

The test methods for brine corrosion resistance in table 1 are as follows:

pouring an aqueous solution containing 5% of salt into a pot, boiling, and observing corrosion conditions of the surface of the pot under the state that the solution is kept slightly boiling. Micro-boiling refers to a state in which the solution has boiled but has not boiled vigorously.

Examples with a thickness of the penetration layer of 5 μm to 50 μm were found to withstand more than 50 cycles, and thus had a better connection firmness, and the corrosion resistance of these examples was improved compared to D1. And the example that the thickness of the penetration layer is larger than 50 μm can be partially detached after 30 times of circulation, so that the connection firmness is not ideal. In combination, the total thickness of the fuse layer 2 and the first nitride layer 31 is preferably selected to be 5 μm to 50 μm.

From the data in table 1, it was found that example 2 had a greater increase in acid corrosion resistance and salt corrosion resistance than example 1, and therefore in a further alternative embodiment, the thickness of the layer 2 was 20 μm to 50 μm.

In some embodiments, the hardness of the first nitride layer 31 is greater than the hardness of the pan body 1, and the hardness of the pan body 1 is greater than the hardness of the fuse layer 2.

The hardness of the fuse layer 2 refers to the hardness of the non-nitrided portion of the fuse layer 2, that is, the portion of the fuse layer 2 other than the first nitride layer 31.

Through setting up the lower layer 2 that melts of hardness, help guaranteeing the firm degree of connection of layer 2 and pot body 1 melts; by providing the first nitride layer 31 having a higher hardness, the surface of the inner cavity 10 can be made to have superior wear resistance.

In some embodiments, referring to fig. 2, the surface of the pan body 1 facing the inner cavity 10 is a rough connecting surface 11 with a roughness, and the melt-blown layer 2 is connected to the rough connecting surface 11.

It will be appreciated that the roughened bonding surface 11 has a plurality of protrusions and depressions that are regularly or irregularly distributed and shaped, and that the machining may be accomplished by a sand blasting process or the like. Alternatively, the roughened junction surface 11 has a surface roughness of Ra2 μm to 10 μm.

By arranging the rough connecting surface 11, the contact area between the penetration layer 2 and the inner cavity 10 can be increased, thereby being beneficial to improving the connection firmness of the penetration layer 2.

In some embodiments, referring to fig. 3 and 4, there is also a second nitride layer 32 on the basis of the embodiment of fig. 1. The second nitride layer 32 is formed on the surface of the pan body 1 facing the inner cavity 10, and the second nitride layer 32 extends from the rough connecting surface 11 into the pan body 1. The second nitride layer 32 at least partially covers the surface of the pan body 1 facing the inner cavity 10, and the fuse layer 2 is connected to the second nitride layer 32.

The second nitride layer 32 may be formed by a nitriding process, specifically, the pot 1 may be subjected to a nitriding treatment before spraying the melted and irradiated layer 2 onto the pot 1, thereby forming the second nitride layer 32.

Table 2 three examples with the second nitride layer 32 were added on the basis of table 1, i.e. examples 4-6 are examples with the second nitride layer 32 added on the basis of examples 1-3, the specific data are shown in table 2:

TABLE 2

From table 2, comparative examples 3 and 6 show that examples 4 to 6 having the second nitride layer 32 can slightly improve the connection firmness of the fuse layer 2 because the surface of the second nitride layer 32 after nitriding is larger than the roughness of the rough connecting surface 11, thereby helping to improve the connection firmness of the fuse layer 2. Meanwhile, as can be seen from comparing examples (for example, examples 1 and 4, examples 2 and 5) with the same thickness of the penetration layer, the second nitride layer 32 can significantly improve the salt corrosion resistance of the cookware, so that the service life of the cookware can be increased.

In some embodiments, the melt-blown layer 2 has a plurality of first micro-holes, the first nitride layer 31 has a plurality of second micro-holes, and the average pore size of the second micro-holes in the first nitride layer 31 is larger than the average pore size of the first micro-holes in the melt-blown layer 2.

It will be appreciated that after the firing and nitridation, the resulting fired layer 2 and first nitrided layer 31 each have a plurality of micropores of varying sizes therein. The average pore size of the second micropores being smaller than that of the first micropores can also be understood as the first nitride layer 31 being denser than the fuse layer 2. The method for making the first nitride layer 31 denser may be to perform secondary nitridation on the pot after the first nitride layer 31 is generated, so that more nitride is generated in the first nitride layer 31, thereby improving the compactness of the first nitride layer 31.

Since the surface of the first nitride layer 31 is a surface that is in direct contact with food, the second micropores can function to limit the penetration of the liquid from the first nitride layer 31 into the fuse layer 2 in the case that the average pore diameter of the second micropores is smaller, so that the first nitride layer 31 provides a better protective effect to the fuse layer 2. In addition, since the average pore size of the second micro pores is smaller and the first nitride layer 31 is in direct contact with food, the total amount of food penetrating into the second micro pores can be reduced, thereby reducing the probability of sticking to the pot.

In some embodiments, the material of the pan body 1 is any one of cast iron, cold-rolled steel sheet, aluminum alloy, copper and copper alloy.

In some embodiments, the surface roughness of the first nitride layer 31 is Ra1.5μm to Ra3.0μm.

By polishing the first nitride layer 31 to have a surface roughness of ra1.5 μm to ra3.0 μm, the surface of the inner cavity 10 can be made smoother, thereby helping to reduce the jamming feeling of the turner and the surface of the inner cavity 10 during stir-frying in cooking and also helping to improve the aesthetic quality of the surface of the inner cavity 10.

The pan means various vessels used for cooking food such as a frying pan, a frying pan and a cooking pan, which not only comprise vessels directly contacted with open fire, but also comprise vessels heated in an electromagnetic mode and the like, and further comprise vessels used for containing food and applied to household appliances such as electric rice cookers, electric pressure cookers, soymilk makers, cooking machines and the like.

The non-mentioned places in the application can be realized by adopting or referring to the prior art.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. A pan, comprising:

the pot body is provided with an inner cavity for cooking food materials;

the meltallizing layer is connected to the surface of the inner cavity and at least partially covers the surface of the inner cavity;

a first nitride layer formed on a surface of the fuse layer, the first nitride layer extending from the surface of the fuse layer into the fuse layer, the first nitride layer at least partially covering the fuse layer;

wherein the total thickness of the melt-shot layer and the first nitride layer is 5 μm to 50 μm.

2. The pot of claim 1 wherein the thickness of the melt-blown layer is 20 μιη to 50 μιη in total thickness of the melt-blown layer and the first nitride layer.

3. The pan of claim 2, wherein the first nitride layer has a thickness of 10 μm to 20 μm.

4. The pan of claim 1, wherein the first nitride layer is completely contained within the melt-shot layer, the first nitride layer having a hardness greater than a hardness of the pan body, the pan body having a hardness greater than a hardness of the melt-shot layer.

5. The pan of claim 1, wherein the surface of the pan body facing the cavity is a rough connection surface with irregularities, and the melt-blown layer is connected to the rough connection surface.

6. The pan of claim 5, wherein a surface of the pan body facing the interior cavity is formed with a second nitrided layer extending from the rough connection face into the pan body; the second nitriding layer at least partially covers the surface of the pot body facing the inner cavity, and the meltallizing layer is connected with the second nitriding layer.

7. The pan of claim 5, wherein the roughened junction surface has a surface roughness of Ra2 μm to Ra10 μm.

8. The pot of any of claims 1-7, wherein the melt-shot layer has a plurality of first micro-holes, the first nitride layer has a plurality of second micro-holes, and the second micro-holes have an average pore size smaller than the average pore size of the first micro-holes.

9. The pan of any one of claims 1 to 7, wherein the pan body is made of any one of cast iron, cold-rolled steel sheet, aluminum alloy, copper and copper alloy.

10. The pan of any one of claims 1 to 7, wherein the surface roughness of the first nitride layer is ra1.5 μm to ra3.0 μm.